CN108439962A - 一种可用于精炼炉的矾土基铝镁浇注料及其制备方法 - Google Patents
一种可用于精炼炉的矾土基铝镁浇注料及其制备方法 Download PDFInfo
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- 238000007670 refining Methods 0.000 title claims abstract description 21
- UAMZXLIURMNTHD-UHFFFAOYSA-N dialuminum;magnesium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Mg+2].[Al+3].[Al+3] UAMZXLIURMNTHD-UHFFFAOYSA-N 0.000 title claims abstract description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 23
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 13
- 239000010431 corundum Substances 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000001095 magnesium carbonate Substances 0.000 claims description 6
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 6
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 6
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 229920001732 Lignosulfonate Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 16
- 239000010959 steel Substances 0.000 abstract description 16
- 239000012071 phase Substances 0.000 abstract description 9
- 239000011159 matrix material Substances 0.000 abstract description 8
- 229910052596 spinel Inorganic materials 0.000 abstract description 5
- 239000011029 spinel Substances 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 229910052681 coesite Inorganic materials 0.000 abstract description 3
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000395 magnesium oxide Substances 0.000 abstract description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000010587 phase diagram Methods 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052682 stishovite Inorganic materials 0.000 abstract description 3
- 229910052905 tridymite Inorganic materials 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052863 mullite Inorganic materials 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract description 2
- 238000003746 solid phase reaction Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910001051 Magnalium Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011010 synthetic spinel Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/44—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminates
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- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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Abstract
本发明属于铝镁浇注料技术领域，特别涉及一种可用于精炼炉的矾土基铝镁浇注料及其制备方法。本发明在铝矾土占比80%左右情况下，通过精确控制基质成分，使产品具有良好的高温使用性能。基质成分位于MgO‑Al2O3‑SiO2系三元相图中MA‑A3S2‑A区间内。基质成分经高温钢水长时间接触，烧结固相反应后基质的物相成分为尖晶石相40%，刚玉相40%，莫来石相20%。其中尖晶石相为新产生的物相。这样的物相组成使浇注料有较好的使用效果。复合微粉的合理配置，解决了施工养护条件要求高的问题。使得该浇注料能在钢厂进行现场施工、养护、烘烤直至投入使用。
Description
技术领域
本发明属于铝镁浇注料技术领域，特别涉及一种可用于精炼炉的矾土基铝镁浇注料及其制备方法。
背景技术
钢包是钢铁冶炼过程中重要的热工设备，钢包内衬材料的性能至关重要，其寿命长短不仅关系到耐火材料的消耗和炼钢成本，而且直接影响钢的产量和质量。因此，延长钢包内衬使用寿命一直是耐火材料领域关注的重点。随着炉外精炼和连铸技术的发展，钢水在钢包内停留时间延长，钢包内衬材料的使用条件日趋苛刻，对其性能要求也随之提高。
相比于其他材质的耐火材料，铝镁浇注料由于具有较好的耐侵蚀性及耐结构剥落性，已成为目前主流的钢包内衬材料。然而，从钢厂的实际应用情况来看，目前所制备的铝镁浇注料性能方面仍存在缺陷。第一，在使用过程中Al2O3及MgO反应生成的尖晶石能够提高耐火材料的抗渣性能，但是难以分布均匀，导致钢包内衬局部受侵蚀严重；第二，原位生成尖晶石反应过程中带来较大的永久线膨胀，导致材料的抗剥落性能下降，内衬材料在中后期开裂严重，大面积剥落；第三，钢水在钢包内部温降较快，内衬材料的隔热性能有待提高。
发明内容
为了解决上述问题，本发明提供了一种可用于精炼炉的矾土基铝镁浇注料及其制备方法。
本发明为实现上述目的而采取的技术方案为：
一种可用于精炼炉的矾土基铝镁浇注料，该耐火浇注料的组成原料按重量百分比配比为：
铝矾土（GL-88） 80~82%
烧结镁砂 7~8%
刚玉细粉 2~10%
复合微粉 0.3~1.5%
有机纤维 0.05~0.1%
减水剂 0.2~0.6%。
作为进一步改进，所述减水剂选自羧酸系高性能减水剂、木质素磺酸盐中的至少一种。
作为进一步改进，刚玉细粉粒度为120目、180目、200目、320目、325目任意比例的混合。
作为进一步改进，所述的复合微粉 内SiO2 含量≥88％，粒径小于10μm。
作为进一步改进，有机纤维为聚乙烯纤维或聚丙烯纤维中一种或两种任意比例的混合。
一种可用于精炼炉的矾土基铝镁浇注料的制备方法，将主要原料铝矾土（GL-88）各烧结镁砂加工成合适粒度的骨料和细粉，按照配方将它们和刚玉细粉、复合微粉、减水剂等分别称量，投入搅拌机搅拌均匀，然后按用户要求包装即得。
作为进一步改进，加入比例小的组分先和某一组分预混合形成较大组分比例，再进行称量配料。
本发明在铝矾土占比80%左右情况下，通过精确控制基质成分，使产品具有良好的高温使用性能。基质成分位于MgO-Al2O3-SiO2系三元相图中MA-A3S2-A区间内。基质成分经高温钢水长时间接触，烧结固相反应后基质的物相成分为尖晶石相40%，刚玉相40%，莫来石相20%。其中尖晶石相为新产生的物相。这样的物相组成使浇注料有较好的使用效果。
复合微粉的合理配置，解决了施工养护条件要求高的问题。使得该浇注料能在钢厂进行现场施工、养护、烘烤直至投入使用。
刚玉尖晶石浇注料主要原料为电熔刚玉（90%）和合成尖晶石（10%），其成本是上述工艺的两倍。
附图说明
图1为本发明MgO-Al2O3-SiO2的三元相图。
具体实施方式
下面结合附图对本发明的具体实施方式做一个详细的说明。
一种可用于精炼炉的矾土基铝镁浇注料，该耐火浇注料的组成原料按重量百分比配比为：
铝矾土（GL-88） 82%
烧结镁砂 8%
刚玉细粉 8%
复合微粉 1.4%
有机纤维 0.05%
减水剂 0.55%。
其所述减水剂选自羧酸系高性能减水剂、木质素磺酸盐中的至少一种。
其刚玉细粉粒度为120目、180目、200目、320目、325目任意比例的混合。
其所述的复合微粉 内SiO2 含量≥88％，粒径小于10μm。
其有机纤维为聚乙烯纤维或聚丙烯纤维中一种或两种任意比例的混合。
一种可用于精炼炉的矾土基铝镁浇注料的制备方法，将主要原料铝矾土（GL-88）各烧结镁砂加工成合适粒度的骨料和细粉，按照配方将它们和刚玉细粉、复合微粉、减水剂等分别称量，投入搅拌机搅拌均匀，然后按用户要求包装即得，加入比例小的组分先和某一组分预混合形成较大组分比例，再进行称量配料。
产品主要性能指标：
1）化学成分：ω（Al2O3）80%～82%,ω(MgO)7%～8%。
2）110℃，24h烘干后：
体积密度2.95～3.00g/cm3,抗折强度8.0～10.0MPa,显气孔率18%～20%。
3）1500℃，3h烧后：
体积密度2.90～2.95g/cm3,抗折强度14.0～18.0MPa,显气孔率19%～21%，
线变化率+（0.0%～0.5%），荷重软化温度（0.2MPa,4%）1500℃～1550℃。
产品使用效果：
A钢厂50吨LF精炼炉，精炼时间40分钟，钢水温度1620℃左右，钢水浇注时间约60－90分钟。在此条件下，浇注料（熔池）使用寿命80炉左右。
B钢厂70吨LF精炼炉，精炼时间30分钟，钢水温度1620℃左右，钢水浇注时间约40－50分钟。在此条件下，浇注料（熔池）使用寿命100炉左右。
Claims (7)
1.一种可用于精炼炉的矾土基铝镁浇注料，其特征在于,该耐火浇注料的组成原料按重量百分比配比为：
铝矾土（GL-88） 80~82%
烧结镁砂 7~8%
刚玉细粉 2~10%
复合微粉 0.3~1.5%
有机纤维 0.05~0.1%
减水剂 0.2~0.6%。
2.根据权利要求1所述的一种可用于精炼炉的矾土基铝镁浇注料，其特征在于：所述减水剂选自羧酸系高性能减水剂、木质素磺酸盐中的至少一种。
3.根据权利要求1所述的一种可用于精炼炉的矾土基铝镁浇注料，其特征在于：刚玉细粉粒度为120目、180目、200目、320目、325目任意比例的混合。
4.根据权利要求1所述的一种可用于精炼炉的矾土基铝镁浇注料，其特征在于：所述的复合微粉 内SiO2 含量≥88％，粒径小于10μm。
5.根据权利要求1所述的一种可用于精炼炉的矾土基铝镁浇注料，其特征在于：有机纤维为聚乙烯纤维或聚丙烯纤维中一种或两种任意比例的混合。
6.一种根据权利要求1所述可用于精炼炉的矾土基铝镁浇注料的制备方法，其特征在于：将主要原料铝矾土（GL-88）各烧结镁砂加工成合适粒度的骨料和细粉，按照配方将它们和刚玉细粉、复合微粉、减水剂等分别称量，投入搅拌机搅拌均匀，然后按用户要求包装即得。
7.根权利要求6所述的一种可用于精炼炉的矾土基铝镁浇注料的制备方法，其特征在于：加入比例小的组分先和某一组分预混合形成较大组分比例，再进行称量配料。
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| CN110451999A (zh) * | 2019-08-28 | 2019-11-15 | 云南濮耐昆钢高温材料有限公司 | 一种铝镁尖晶石质耐火浇注料及其制备方法 |
| CN111362710A (zh) * | 2020-05-11 | 2020-07-03 | 河南兴亚能源有限公司 | 一种均化矾土基铝镁浇注料及其制备方法 |
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|---|---|---|---|---|
| CN110451999A (zh) * | 2019-08-28 | 2019-11-15 | 云南濮耐昆钢高温材料有限公司 | 一种铝镁尖晶石质耐火浇注料及其制备方法 |
| CN111362710A (zh) * | 2020-05-11 | 2020-07-03 | 河南兴亚能源有限公司 | 一种均化矾土基铝镁浇注料及其制备方法 |
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